abstract
arc
background
blue
bolt
bright
bulb
business
cloud
communication
concept
conceptual
connection
contact
control
current
danger
data
electric
electrical
electrician
electricity
energy
finger
fire
fist
flash
hand
human
industry
innovation
inspiration
light
lightbulb
lightening
lightning
man
media
nature
network
power
relation
science
semiconductor
shock
spark
static
strike
technology
thunder